Device for cutting threads and other lathe-work.



J. F. IVARSON.

DEVICE FOR CUTTING THREADS AND OTHER LATHE WORK.

APPLICATION FILED SEPT. 10, 1909A 1,029,014, Patented June 11,1912.

EIM, BY

A TTORNIIYS UNITED STATES YAJENT lf,

JOHN F. IVARSON, OF BOSTON, VASSACEUIS'ET'ISA DEVICE FOR CUTTING THREADS AND OTHER LA-ILJORK,

Application filed September Specification of Lettez's Patent.

munis in the mannii mi' nmuntin; r :ind feed ing' tunis in :i iathe.

To thi und ny mniin'iscs nn inipim'i! inni fui' V-Lhi'uds, and iinpi'ovenicnlcs in the I niiins for mounting, adjusting :ind funding 1G, 19GB. Savini No. 517.240.

ih@ i001, whereby the cutting is (hina by ai i Single edge of the. 1.001, thi tool in pusiiwy i ficilx inw (hu win'k along; mw hun mi" thv 2 with ila :singin n'min cutting' iilgv. whivh rum` in :i Sliziighl lnwr www thu vniii'u uni nl' he lumi. Thin gives @my und iiw, cui

inhi Uw n'mh' :ind hfnws ii summum'. hun

This, inwnlimn :ilw vnnhh-,w hui'h (mais iii' hi; funi in hir uw@ fin* Uniting hhifhs :ind

la Spin i'i wif vini "l ing' www pushing the sereiv 20 into the pedestal so that, the groove 32 is fully exposed within slot 23; sueh other device a, desired in the groove. and then drawing the serew 2O outward till this ring enters the recess and `seats against the shoulder 33. After this the hand wheel 551 is put. on and iiiade fast to the Ashaft of f serew 2t), thus holding the partsl in the posi tion shown.

rl`he hase plate. 1G is adapted to fit the groove l() in a slitte rest l1 of a lathe in whieh the tool post of a lathe ordinarilv tits. 1t isntntlerstood that in applying the invention .ftiiy ordinary or suitable ineans' may he employed for causingr the .slide rest Vtl. which niay he eoiisidered as on or eoin prising the carriage of the lathe, to travel to and fro parallel to the line which is the axisl of the work. .\s .sueli ineans are welltunderstood in the art. they are eniitv ted troni the drawing for the' sake of sini plieit)v and to 'save eoniplit'ations. saine reason -a portrayal of an entire lathe oniittedI` the tail stoek 10 being,r shown to indit-ate the presenee and relative position of an)v suit'alde tvpe of lathe, and the pieee of work or steek l1 with the axis line si;;'nit' viii;`r the position ot the workA and its axisl and the axiaof the lathe. '1`he hase plate lt't is' seein-ed in position on this slide rest and theiehv is secured in a detiiiite angular i'elation to the axis' ot' the lathe. viz., parallel thereto, as here represented, iii the nianner following. lit has lugs 17, 18 projecting downward and adapted to engage in the groove of the slitte rest eusioniarily found in the tool supportingA arrangement of a lathe. this heine' the groove in whieh the Collar under the, tool post ot' a lathe is ordinarily engaged.

ln the drawings the part -1l represents a rest or plate on the eairiage of the lathe whit-h is supported and eonneeted h v anyF suitalile ineehanisni so that it nioves to and fro in n line parallel with the line A\ oll hij; l. 'l`he head otl holt Siti' titsloosely in this groove, its .shaft projeeting npw ard. as seen in the l'ragnientai'i ett-tation at thtright of Vig'. l. and when the plate lt', is in plate. the holt gnojt'ets up through the hole lit therein and the plate is elauiped down tightv liv means of this holt in the well known manner. 'llie grooie ttl iu the plate 1l, whieli groove is' -seen in elevation at the right olA Vig'. l and is. -seen inostlv in dott-ed linesy in Fig. 1, rnnrt parallel tothe line .L the plate tt'` therefore. when the apparatus if.' in use, ir. elauiped rigidi)y to the plate -ll h v holt IHS', with its' lugs ll, IS, pressed against one side ol4 the. groove as reprtwentetl in the tl:'.-vii:;;.

l"or annie purposes it mayI lie desirable f pos-Elite the, tixed angular .don lieb-.vien this groove and the axis then putting the split ring 371 or For the tof the work something other than ono of parallelism and therefore the patent is not to he limited merely to arallelism, although the angular relation. whichJ in a mathematical sense is expressed by the tern: parallel. is that which is preferred for ordirar)v purposes. IWhen pressed against the shoulder fornied h v either side of this groove. the lugs 1T7 1S are consequently in a line parallel to the axisl of the lathe ahh-li in lf'ig. 1 is represented h y line The tros-sl feed, heine` at right angles to the. axi` otl the lathe` as eustoniary, works in the diret't'ion of the line l. 'l`he groove 13 and .serevt 2t) are set on the upper side of plate tt' at an angle with respect to the lugs l. 1S. on the under side: eorresponding to the angle with respeet to the axis-of the lathtI desired tor oie faee of the thread. 'l`hen when the tool li'isfed h v 5er-ew Q0 itshpoint travels a palthr whieh deserihes one t'aee ot' the desired thread. The other .face is eut h v the ruttine edjeje ot the tool. 1n the rits-e illustrated. Fig. 1. a (it)O thread is represented and eonseduentlv, the angle he tween the' line of the lugs 17. 18, Whieh is parallel to the axis of the lathe, and the axis ot' sei-ew 20 whieh defines the direction ot the feed ot' the. tool is (300. The base plate lt is fastened to the vslide rest in any suitable inaniier. 'l`lie drawing shows means eonsist'ing of a holt hole 3G through the plate` through whieh a hott 36 may pSS having an under head adapted to engage in the groove 40. like the under head 0f an ordinariY tool post.

'l`he` tools are slightly .shown in Fig. 3 to inake and the `groove is wedge shaped as proper clearance; ,slightly tapering to correspoiid` heilig iiarrotvei" at its bottoni. It iS therefore adapted to reeeive ols whose.

width varies slightly, inannfat-tuie. t the hottoin of this groove is a sei-ew IE5. .\s the tool rests iu groove 13 and in elanip 1t, l5, it is held firmly; and the pressure of the work upon it'when iii use pushesA it down inore tirinly into the groove or upon the serew 3&5, thus holding.,r it rigid in the pedestal 21. The latter is `supported at its front entl almost iin; ldiately under the tool hy the aforementioned sei-ew end 2G and is held on the other side hv the rigid elainp sei-ew 29 and at the other end h v the pivot 22: so that the tool is held tirait)v and synniietrieally supported on a tripod; hut is nevertheless free to be fed toward and froin the work at its angle of otto hy ineans of hand wheel 31. 1f the pressure ot' the work foi-ees it into groove li so tightly that it feeds therein with ditlieulty. the sei-ew 255 may lie raised, thereby takin;r sonie of the friction away front tho geroot. sides, heeause the tool then rests niore or v'hollvv upon the set-ewl the groote, sides serving as sidewise guides. The eleas may happen in hy hmm muy ho mUwta-d provision.

l() thv pm fave of thc work. .\s gruuw matting wexu hcnhll' tu thv S l n. l I 4 r ,J 111. i

sh x1 thu 1V he 115ML the im mnt in E U M hij". thv 100| hu Wh uml grim , 4 M nllmu lf:

nin

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ing ways; und a block adapted t0 travel thereon toward and from the Work; means to feed the block; means t0 fasten a reel tf1 the bleek; and a support for the tool hetiveen Suid bleek and the Work.

T. The combination of :i tool support und teni-feeding means thereon; said support hm lng u grneve, ruiming in the direetiml of 1 slightly thnvnwnrd; and there being in the ,smid groove having :in upen top and having sides eenveiging bottom of the groeve means to support the the] nl varying elevations therein.

The ennihinntien ef n toni support and teni feeding munis iherenn; said feeding inn-:lne emni'irisingf :r screw having :i journal hearing ma sind support; :he serew shafthnvingr :in annular groeve :ind the support havingr :in annular reeens registering therevviih; :in annular hey in ,anni groove and recesS separable inln sections; and means fast on the shaft engaging the support and thereby hohing said groeve and reeeSS in register.

Signed by ine :it Reston, Muss., this lst dey an" September; 1909,

JOHN F. IVARSON.

Wiinee-SMI E vnnnrr E: Kn rrr, Jnsns'ii T. imaiwwiirv. 

